Breeds in Canada from south-central Mackenzie (in Northwest Territories), Peace R lowlands of north-eastern British Columbia and throughout lowlands of Alberta east to central Manitoba, northern and eastern Ontario and locally southern Quebec, southern in USA to north-western Montana, northern South Dakota, southern Minnesota and northern Michigan. Non-breeding southern USA from central Kansas, north-western Arkansas, southern Georgia and coastal South Carolina south to Gulf Coast (Texas east to western Florida).
 
Population
Estimated population is 3,000,000 (2010).
LeConte's Sparrow (Ammospiza leconteii) [XC153351]
by Terry Davis from Foam Lake No. 276 (near Margo), Division No. 10, Saskatchewan, Canada (song)
LeConte's Sparrow (Ammospiza leconteii) [XC282767]
by from Lostwood NWR, Burke County, North Dakota, United States (song)
Subspecies
No subspecies.
Genus, as currently delimited, is probably polyphyletic. Molecular studies suggest that present species is in a clade with Seaside Sparrow (Ammospiza maritima), Nelson's Sparrow (Ammospiza nelsoni) and Sharp-tailed Sparrow (Ammospiza caudacuta). Has hybridized with Nelson's Sparrow (Ammospiza nelsoni).